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High-power silicon nitride ceramic heating sheet and fabrication method for hard inner part and flexible outer part thereof

A silicon nitride ceramic, high-power technology, applied in the field of silicon nitride ceramics, can solve the problems of difficult to weld lead wires, unstable power, uneven heating, etc., and achieve the effects of accurate resistance, firm lead, and uniform heating

Active Publication Date: 2017-08-15
常德科锐新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the disadvantages of tungsten wire being easily damaged, uneven heating, difficult to weld lead wires, and unstable power in the above three methods, the present invention proposes a new integral high-power ceramic heating chip and its inner hard outer soft production. method

Method used

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  • High-power silicon nitride ceramic heating sheet and fabrication method for hard inner part and flexible outer part thereof
  • High-power silicon nitride ceramic heating sheet and fabrication method for hard inner part and flexible outer part thereof
  • High-power silicon nitride ceramic heating sheet and fabrication method for hard inner part and flexible outer part thereof

Examples

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Effect test

Embodiment 1

[0052] Embodiment 1, cigarette lighter, specification 90X5X4mm, 500 watts, 1100°C, processed to 1100°C within 10 seconds.

[0053] 1. Insulating ceramic material: silicon nitride Si 3 N 4 , 94%; Ytterbium oxide Y 2 o 3 , 1-3%; aluminum oxide Al 2 o 3 , 0.5-1.5%; magnesium oxide MgO, 0.2-0.5%; lanthanum trioxide La 2 o 3 , 0.5-1%; hafnium oxide HfO 2 , 0.2-0.5%, aluminum nitride AlN, 0.5-2%, the weight of all components is 100%.

[0054] 2. Heating ceramic material: silicon nitride Si 3 N 4 , 45%, solid solution of titanium carbide and titanium nitride, Ti (C, N), 26-35%; the weight ratio of titanium carbide and titanium nitride in the solid solution is 4:6; molybdenum powder Mo, 0.5-3%; Nano nickel Ni, 0.5-1.0%; Niobium carbide CHNb, 0.2%; Whisker silicon carbide SiC, 0.2-0.5%; Molybdenum silicide MoSi 2 , 0.1-0.2%; silicon oxide SiO 2 , 0.1-0.2%; alumina Al 2 o 3 , 5-10%, the weight of all components is 100%.

[0055] 3. Welding ceramic materials: titanium ...

Embodiment 2

[0064] Embodiment 2. Drying sheet, specification 1200X12X4mm, 600 watts, processed to 258°C in 2 seconds, durability for 2 years. Among the weight ratios of the three ceramic materials,

[0065] 1. Insulating ceramic material: silicon nitride Si 3 N 4 , 93%; Ytterbium oxide Y 2 o 3 , 1-3%; aluminum oxide Al 2 o 3 , 0.5-1.5%; magnesium oxide MgO, 0.2-0.5%; lanthanum trioxide La 2 o 3 , 0.5-1%; hafnium oxide HfO 2 , 0.2-0.5%, aluminum nitride AlN, 0.5-2%, the weight of all components is 100%.

[0066] 2. Heating ceramic material: silicon nitride Si 3 N 4 , 45%, solid solution of titanium carbide and titanium nitride, Ti (C, N), 26-35%; the weight ratio of titanium carbide and titanium nitride in the solid solution is 4:6; molybdenum powder Mo, 0.5-3%; Nano nickel Ni, 0.5-1.0%; Niobium carbide CHNb, 0.2%; Whisker silicon carbide SiC, 0.2-0.5%; Molybdenum silicide MoSi 2 , 0.1-0.2%; silicon oxide SiO 2 , 0.1-0.2%; alumina Al 2 o 3 , 5-10%, the weight of all comp...

Embodiment 3

[0069] Embodiment 3, a heating chip, the specification is 150X25X4mm, 800 watts, heated to 1000° C. in 10 seconds.

[0070] Among the weight ratios of the three ceramic materials,

[0071] 1. Insulating ceramic material: silicon nitride Si 3 N 4 , 91.5%; Ytterbium oxide Y 2 o 3 , 1-3%; aluminum oxide Al 2 o 3 , 0.5-1.5%; magnesium oxide MgO, 0.2-0.5%; lanthanum trioxide La 2 o 3 , 0.5-1%; hafnium oxide HfO 2 , 0.2-0.5%, aluminum nitride AlN, 0.5-2%, the weight of all components is 100%.

[0072] 2. Heating ceramic material: silicon nitride Si 3 N 4 , 45%, solid solution of titanium carbide and titanium nitride, Ti (C, N), 26-35%; the weight ratio of titanium carbide and titanium nitride in the solid solution is 4:6; molybdenum powder Mo, 0.5-3%; Nano nickel Ni, 0.5-1.0%; Niobium carbide CHNb, 0.2%; Whisker silicon carbide SiC, 0.2-0.5%; Molybdenum silicide MoSi 2 , 0.1-0.2%; silicon oxide SiO 2 , 0.1-0.2%; alumina Al 2 o 3 , 5-10%, the weight of all componen...

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Abstract

The invention relates to a high-power silicon nitride ceramic heating sheet and a fabrication method for a hard inner part and flexible outer part thereof. The fabrication method comprises the following steps of 1, granulating an insulation ceramic material; 2, fabricating cylindrical particles into insulation ceramic blanks, and drying the insulation ceramic blanks; 3, performing drying, granulation, formation, tabletting, degumming, sintering and cutting to the required heating ceramic sheet and a welding ceramic sheet; and 4, integratedly laminating the two insulation ceramic blanks which are formed already, the heating ceramic sheet and the welding ceramic sheet for hardening, degumming, sintering and cutting to a required shape. The fabrication method has the advantages that 1, rapid heating and accurate temperature control can be achieved; 2, the heating ceramic is very uniform in heat generation, and the thermal loss is very low; 3, the heating ceramic, the insulation ceramic and the welding ceramic are integratedly sintered, and no interface and good quality are achieved; and 4, the welding area is large, and the welding outgoing line is very firm.

Description

technical field [0001] The invention relates to a silicon nitride ceramic, that is, a high-power silicon nitride ceramic heating plate and a manufacturing method thereof which is hard on the inside and soft on the outside. Background technique [0002] High-power silicon nitride ceramic heating plate, generally refers to more than 500W, and the power per unit area is greater than 50 watts / cm 2 . [0003] Due to the characteristics of light weight, small size, fast heating speed, high power, low heat consumption, high heat transfer efficiency, stable and no deformation at high temperature, it is used more and more in all walks of life, especially in the electronic industry. more extensive. [0004] At present, there are two methods of making silicon nitride ceramic heating plates in China: [0005] Method 1: Bend the tungsten wire into a spring shape, place springs of different lengths in the silicon nitride material according to the resistance required, compact and sinter...

Claims

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Application Information

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IPC IPC(8): H05B3/14C04B35/56C04B35/584C04B35/634C04B35/80C04B35/64C04B35/645B32B18/00
CPCB32B18/00B32B2264/107B32B2307/302B32B2307/306C04B35/5611C04B35/584C04B35/63408C04B35/63488C04B35/64C04B35/6455C04B35/806C04B2235/3206C04B2235/3217C04B2235/3224C04B2235/3227C04B2235/3244C04B2235/3418C04B2235/3839C04B2235/3843C04B2235/3865C04B2235/3873C04B2235/3886C04B2235/3891C04B2235/5276C04B2235/661C04B2235/77H05B3/141
Inventor 肖毅
Owner 常德科锐新材料科技有限公司
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